Uptake is very rapid, and new bugs can show up between a beta and a GM release of iOS. It's not enough baking time to test against a GM version of iOS and successfully submit an update to the app store that is accepted and reviewed that is the issue here.

Imagine if your app crashes on launch with iOS 14 GM and does not on the latest beta, your business has been materially effected as a result.

If you’re not seeing how, one sentence: angry users leave reviews.

I am already hearing screams of "This worked under iOS14beta6 from last week!!! Now it crashes on launch!!!"

(From firends/contacts, none of the apps I have to deal with, at least not so far...)

I agree, but the amount of apps that crashes is not that big. Also, this is only for a few days, until the developer fixes it.

Sure it would be nice to have a few days of extra preparation. But the post is obviously a result of pure frustration by developer and is exaggerated.

If you call everyone assholes because of such things then all software industry are assholes.

A quick googeling only showed data for iOS 10 but I would belive that the ballbark is the same. https://www.zdnet.com/article/ios-10-adoption-nears-15-after...

So 15% on the first day, with 1.5 billion active iOS devices. Thats a pretty high number of potential unsattisfied user experience.

If previous years are any indication, approximately 30% of users will update on the first day.